0700300643 - ESAB RT 42W-NG Water Cooled Robotic Torch Neck

Precision Replacement for Robotic Welding Systems

The ESAB Torch Neck RT 42W-NG (0700300643) is a premium replacement component designed specifically for ESAB's RT 42W series of robotic welding torches. In the demanding world of automated manufacturing, the torch neck—often referred to as the swan neck—plays a pivotal role in directing the welding wire and shielding gas to the workpiece with absolute precision. Because robotic cells rely on exact repeatability, using genuine ESAB parts is essential to maintain the Tool Center Point (TCP) and avoid costly reprogramming or weld defects.

This specific model features a water-cooled design, which is critical for high-amperage applications and continuous duty cycles often found in automotive and heavy fabrication environments. Water cooling ensures that the contact tip and nozzle remain at optimal operating temperatures, significantly extending the life of your consumables and preventing the torch body itself from overheating. The internal coolant channels are engineered to maximize flow rate and heat transfer, allowing your robotic system to run longer and more efficiently without thermal interruptions.

Over time, torch necks can become damaged due to collisions, spatter buildup, or general wear and tear. A compromised neck can lead to erratic wire feeding, poor gas coverage, or coolant leaks that threaten weld quality. Replacing a worn unit with the ESAB RT 42W-NG restores your system to factory specifications. Its robust construction is built to withstand the mechanical stresses of rapid robotic movements and the harsh thermal environment of the weld pool.

Key Benefits for Industrial Automation

• Exact Compatibility: Designed exclusively for the RT 42W platform, ensuring a seamless fit with existing cable assemblies and mounting arms.


• Thermal Management: Superior water cooling capabilities protect sensitive internal components and allow for higher welding parameters.


• Process Stability: Rigid construction minimizes vibration and deflection, ensuring the arc is placed exactly where programmed every time.

Invest in the longevity and accuracy of your automated welding cell with the ESAB 0700300643 Torch Neck. Whether you are performing routine maintenance or repairing a crash, this OEM part provides the reliability professional fabricators demand.